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4. MAINTENANCE
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4.2 Replacing the Fuse
The 5A fuse (Type: FGBO-A 125V 5A PBF, Code No. 000-155-853-10) in the snap-in fuse holder
on the power cable protects the equipment from equipment fault and reverse polarity of the ship's
mains. If the equipment cannot be powered, the fuse may have blown. Find out the cause for
blown fuse before replacing it. If the fuse blows again after replacement, contact a FURUNO agent
or dealer for advice.
4.3 Restoring Default Settings
This procedure restores all default sounder settings on the NavNet series. You can restore all de-
fault settings or restore those other than transducer and LAN. This procedure should only be per-
formed by a suitably qualified FURUNO technician.
1. Disconnect the power and LAN cables from the DFF3.
2. Turn on the #1 and #2 switches of the Mode switch. See section 3.2 for the location.
3. Turn on the #7 or #8 switch of the Mode switch as applicable.
#7: Restore default settings other than LAN and transducer.
#8: Restore all default settings. Use this when changing transducers.
4. Connect the power cable to the DFF3, and turn on the power at the ship’s switchboard.
5. The LED blinks (every four seconds) when default settings are completely restored.
WARNING
Use the proper fuse.
Use of a wrong fuse can damage the equip-
ment and cause fire.
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